Updated CHANGELOG.md

Author: konakonall

CHANGELOG.md

@@ -7,6 +7,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
+## [v2.9.18](https://github.com/tencentyun/cos-nodejs-sdk-v5/compare/v2.9.17...v2.9.18) - 2021-06-03
+
+-demo新增简单上传base64内容文件
+-sliceUploadFile方法新增返回值UploadId
+
+### Merged
+
+- feat [`#106`](https://github.com/tencentyun/cos-nodejs-sdk-v5/pull/106)
+
+### Commits
+
+- Updated CHANGELOG.md [`d674abf`](https://github.com/tencentyun/cos-nodejs-sdk-v5/commit/d674abf5d8feaefed694a6703907b5f15bed874d)
+- update version 2.9.18 [`50493fc`](https://github.com/tencentyun/cos-nodejs-sdk-v5/commit/50493fce07a1d41b621638ac440a1e7eedfe0425)
+- upd：优化demo [`80020bb`](https://github.com/tencentyun/cos-nodejs-sdk-v5/commit/80020bbf6b0bed6d7ca446cd4bd480e7468bce87)
+
 ## [v2.9.17](https://github.com/tencentyun/cos-nodejs-sdk-v5/compare/v2.9.15...v2.9.17) - 2021-05-28
 
 ### Merged